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I'm working on it I suspect its the new element material but need to verify. Had death of very close friend this weekend so I'm tied up for next couple of days and will have to modify my weeks schedule in morning when everyone is back to work.

I don't know if this applies to this discussion, but my filter is a solid canister type. My tech suggested replacing it with an upgraded filter with a clear plastic bottom 1/3 of the filter. Says it's easier to purge if you can see it needs it. It sure made sense to me.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Corkey:
I don't know if this applies to this discussion, but my filter is a solid canister type. My tech suggested replacing it with an upgraded filter with a clear plastic bottom 1/3 of the filter. Says it's easier to purge if you can see it needs it. It sure made sense to me. </div></BLOCKQUOTE>

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I'm not sure why chassis manufacturers decide to use one type vs another. My 99 Discovery on an FCCC chassis came with the filter/bowl FS1242 (now the FS1015B) but my 2006 Spartan came with the FS1003 (now the FS15596). I will say that in 7 yrs and 90,000 miles I never had any water in the bowl or at least not enough to be easily visible and the yearly change cycle made it moot.

I would point out that fit doesn't mean same quality any more than meeting an SAE or some other standard means that all products that meet it are of same quality. The Cummins Filtration filter media in the filters being discussed here are made of a proprietary media tradenamed StrataPore which is a multi-layer melt blown material. The American Filtration Society named this as the most technically advanced design.

It costs about $8 more than a WIX,which for me is insignificant for a product that is so critical to the life of the fuel system.

Ok, the difference is that the upgrade is 7 micron vs 10 micron in original. The media material is same- no change. So, I know what changed but not why. My contact was unaware of the change so we all need to do some more research and see who or why this was changed.

Could this be a filter for the 2007 emissions engines? </div></BLOCKQUOTE>

That's what been in the back of my head but I wonder whether some sort of data showed it might be desirable to have cleaner fuel to the injectors due to the higher water content of bio-fuel and ULSD. Even a minute amount of water can do a lot of damage.